( *67 ) 
The Species, with us, 
Xanthoxylum fraxinifolium. Ajh -leaved Tooth - 
ach Tree . 
This grows naturally in Pennfylvania and Mary" 
land; rifing with a pretty ftrong Item to the height 
of ten or twelve feet ; and dividing in many branch- 
es, which are covered with a purplifh bark, and 
armed at each bud with two ftrong, (harp fpines. 
The leaves are compofed of four or five pair of lobes, 
terminated by an odd one ; which are entire and of 
an oblong egg -fh ape, placed oppofite and fitting 
clofeto the common footftalk, which is alfo fet with 
a few fpines underneath. The flowers are produced 
along the branches, upon fliort colle&ed footftalks; 
and thofe of the female are each fucceeded, for the 
moft part, with five diftind, oval capfules, joined 
by fliort footftalks to the common receptacle, and 
fpreading above ; each containing one roundifii, 
fmooth feed. 
There is faid to be another Species, or perhaps 
Variety, of this in South Carolina, differing in hav- 
ing the lobes of their leaves lanee-ftiaped, fawed on 
their edges and having footftalks. The bark and 
capfules are of a hot acrid tafte, and are ufed for 
eafing the tooth-ach, from whence it obtained the 
name of Tooth-ach Tree : a tincture of them are 
alfo much commended for the cure of the Rheuma- 
tifm. 
XANTHORHIZA, 
SHRUB YELLOW ROOT. 
Clafs 5. Order 6. Pentandria Polygynia. 
HP HE Empalement none. 
A The Corolla is of five petals, lance-fliaped, pointed and 
fpreading. The 
